Find the zeros of the function. y=1/2(2x+5)(x+4)

i think the answers are x=-2.5 and x=-4 but i'm not sure about the -2.5 pls

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

The length of a rectangle plus its width is 25 cm. the area is 156 square cm. what are the length and width of the rectangle? separate the answers with a comma.

What are the first 4 terms in the multiplication pattern given by the formula 2×4n